Remove/Install Knock Sensors - AR15.12-P-2184MRA
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Engine 274.9 in model 205
Engine 274.9 in model 253
Shown on Engine 274 in model 205.042
Fig 1: Knock Sensors Components Location - Engine 274.9 In Model 253 (Shown On Engine 274 In Model 205.042)
| Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of death when working on component parts and systems with U > = 30 V alternating voltage (AC) or U > = 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. |
AS00.00-Z-0035-01A | |
| General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system | AH00.00-Z-0300-01A | ||
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| Remove/install | |||
| 1 | Perform disable for the high voltage on-board electrical system | Engine 274.9 in model 205.047/147/247 Engine 274.9 in model 253.354/954 |
|
| Engine 274.9 in model 205.047/147/247 | AR54.10-P-1150LW | ||
| Engine 274.9 in model 253.354/954 | AR54.10-P-1150LVH | ||
| 2 | Remove upper Engine cover | ||
| 3 | Remove center and rear lower Engine compartment paneling | AR61.20-P-1105LW | |
| 4 | Release and disconnect the high voltage plug from electrical A/C compressor | Engine 274.9 in model 205.047/147/247 Engine 274.9 in model 253.354/954 Engine 274.9 in model 205.047/147/247 with code ME06 (Hybrid drive 60 kW variant (incl. plugin)) Engine 274.9 in model 253.354/954 |
AR83.55-P-5311LWH |
| 5 | Unclip high-voltage line from charge air cooler bracket and place to one side | Engine 274.9 in model 205.047/147/247 Engine 274.9 in model 253.354/954 |
|
| 6.1 | Remove alternator | Engine 274.9 in model 205 (except 205.047/147/247) Engine 274.9 in model 253 (except 253.354/954) |
AR15.40-P-5032LWA |
| 6.2 | Remove electrical vacuum pump | Engine 274.9 in model 205.047/147/247 Engine 274.9 in model 253.354/954 Engine 274.9 in model 205.047/147/247 |
AR43.05-P-0001MRD |
| Engine 274.9 in model 253.354/954 | AR43.05-P-0001LVH | ||
| 7 | Remove charge air cooler | AR09.41-P-6819MRA | |
| 8 | Release and disconnect electrical connections for knock sensors (A16/1, A16/2) | ||
| 9 | Remove knock sensors (A16/1, A16/2) | *BA15.10-P-1001-02B | |
| 10 | Install in the reverse order | ||
| 11 |
Read out and erase fault memory | AD00.00-P-2000-04B | |
| Risk of accident from vehicle starting off by itself when Engine running. Risk of injury (bruises and burns) resulting from working on the Engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 12 | Perform an Engine test run and check Engine for proper operation and leaktightness | ||
| 13 | Install center and lower Engine compartment paneling | AR61.20-P-1105LW | |
| 14 | Install upper Engine cover |
KNOCK SENSORS
| Number | Designation | Engine 274 | |
|---|---|---|---|
| BA15.10-P-1001-02B | Bolt, knock sensor to crankcase | Nm | 20 |